two-level storage造句

The two - level storage structure consists of basic information table of survey area and data table of survey spot , both of which is related by serial number of survey area
两级存储结构为测区基本信息表和测点数据表，通过测区编号建立对应关系。
1 . building aerial gamma - ray spectrometric database developed with sql server 2000 database management system , the entity - relation model of aerial gamma - ray spectrometric database is designed . a two - level storage structure is adopted to store aerial gamma - ray spectrometric survey data so as to shorten data rebundancy maxmimumly
建立航空伽玛能谱数据库以sqlserver2000数据库管理系统为开发平台，设计了航空伽玛能谱数据库的实体?关系模型，采用两级存储结构来存储航空伽玛能谱测量数据，最大限度地降低了数据冗余度。
It's difficult to find two-level storage in a sentence. 用two-level storage造句挺难的